/*
 * Copyright 2013-2023 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.cloud.nacos;

import com.alibaba.cloud.nacos.refresh.NacosContextRefresher;
import com.alibaba.cloud.nacos.refresh.NacosRefreshHistory;
import com.alibaba.cloud.nacos.refresh.SmartConfigurationPropertiesRebinder;
import com.alibaba.cloud.nacos.refresh.condition.ConditionalOnNonDefaultBehavior;

import org.springframework.beans.factory.BeanFactoryUtils;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.autoconfigure.condition.SearchStrategy;
import org.springframework.cloud.context.properties.ConfigurationPropertiesBeans;
import org.springframework.cloud.context.properties.ConfigurationPropertiesRebinder;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author juven.xuxb
 * @author freeman
 */
@Configuration(proxyBeanMethods = false)
@ConditionalOnProperty(name = "spring.cloud.nacos.config.enabled", matchIfMissing = true)
public class NacosConfigAutoConfiguration {

    @Bean
    @ConditionalOnMissingBean(value = NacosConfigProperties.class, search = SearchStrategy.CURRENT)
    public NacosConfigProperties nacosConfigProperties(ApplicationContext context) {
        if (context.getParent() != null && BeanFactoryUtils.beanNamesForTypeIncludingAncestors(context.getParent(), NacosConfigProperties.class).length > 0) {
            return BeanFactoryUtils.beanOfTypeIncludingAncestors(context.getParent(), NacosConfigProperties.class);
        }
        return new NacosConfigProperties();
    }

    @Bean
    public NacosRefreshHistory nacosRefreshHistory() {
        return new NacosRefreshHistory();
    }

    @Bean
    public NacosConfigManager nacosConfigManager(NacosConfigProperties nacosConfigProperties) {
        return new NacosConfigManager(nacosConfigProperties);
    }

    @Bean
    public NacosContextRefresher nacosContextRefresher(NacosConfigManager nacosConfigManager,
                                                       NacosRefreshHistory nacosRefreshHistory) {
        // Consider that it is not necessary to be compatible with the previous
        // configuration
        // and use the new configuration if necessary.
        return new NacosContextRefresher(nacosConfigManager, nacosRefreshHistory);
    }

    @Bean
    @ConditionalOnMissingBean(search = SearchStrategy.CURRENT)
    @ConditionalOnNonDefaultBehavior
    public ConfigurationPropertiesRebinder smartConfigurationPropertiesRebinder(ConfigurationPropertiesBeans beans) {
        // If using default behavior, not use SmartConfigurationPropertiesRebinder.
        // Minimize te possibility of making mistakes.
        return new SmartConfigurationPropertiesRebinder(beans);
    }

}
